| 摘要 |
PURPOSE:To manufacture the molded product omitting the need of a cutoff and having a good appearance and good properties, by shaping a relief for a pouring part forming stock at the position which has no influence on the appearance and properties of the molded product. CONSTITUTION:The linear parts 1a, 1a beforehand molded are placed at opposite positions in a mold 8 and the stock of an unvulcanized rubber, etc. is poured in a poruing part 7 somewhat more than the volume of the pouring part 7. After the poruing part 7 is filled, the excess stock is poured further in the stock relief pouring parts 9a, 9b and a poruing pressure is absorbed by this. Thereby the weatherstrip 1 of which the linear parts 1a, 1a molded by an extrusion molding an continuous vulcanization method and the corner part 1b molded by a cast molding are made in one piece is finished. The relief 11 is shaped by poruing the excess stock in the stock relief pouring parts 9a, 9b at the back faces 5b, 6b of the seal lip 5 and the drip lip 6 of the linear parts 1a, 1a, but these positions exist at the back faces 5b, 6b of the seals, have no influence on a sealing property and do not give any trouble to an appearance, so a cutoff is unnecessary. |
